| Michelson干涉仪式光纤空气声传感器 |
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| 引用本文： | 王永杰,李芳,肖浩,刘育梁.Michelson干涉仪式光纤空气声传感器[J].光子学报,2009,38(5):1114-1117. |
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| 作者姓名： | 王永杰 李芳 肖浩 刘育梁 |
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| 作者单位： | 中国科学院半导体研究所,光电系统实验室,北京,100083 |
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| 基金项目： | 中国科学院创新基金项目(批准号：CXJJ-177 ) 资助的课题;上海青年科技启明星项目 |
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| 摘 要： | 介绍了一种用于直升机等低空目标探测的光纤空气声传感器.该传感器基于光纤Michelson干涉仪的原理，结合弹性盘片的应力应变理论分析和光纤粘接的工艺设计，采用相位载波解调技术进行信号解调.对比实验测试验证了这种声音探测技术可行性.传感器理论灵敏度为2.38 rad/Pa，实测灵敏度为1.5 rad/Pa，采用PGC相位解调理论最小可探测的最小声信号为6.7 μPa，即9.5 dB.传感器在20～300 Hz范围内响应基本平坦.结合声音传播规律分析并肯定其在实用中的可行性.
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| 关 键 词： | 光纤传感器 光纤空气声传感器 麦克尔逊干涉仪 弹性盘片 |
| 收稿时间： | 2008-02-27 |
| 修稿时间： | 2008-05-12 |
Fiber Optic Sound Sensor Based on Michelson Interferometer |
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| WANG Yong-jie,LI Fang,Xiao Hao,LIU Yu-liang.Fiber Optic Sound Sensor Based on Michelson Interferometer[J].Acta Photonica Sinica,2009,38(5):1114-1117. |
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| Authors: | WANG Yong-jie LI Fang Xiao Hao LIU Yu-liang |
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| Institution: | (Optoelectronic System Laboratory,Institute of Semiconductors Chinese Academy of Sciences,Beijing 100083,China) |
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| Abstract: | A novel Fiber Optic Sound Sensor (FOSS) for detecting military targets was presented.The principle of the FOSS was based on Michelson interferer technology and the transducer was made of a plate disk and a fiber.The model was established by theoretically analyzing the strain distribution throughout the pate disk.The FOSS was tested experimentally.The results show that the theoretical sensitivity is 2.38 rad·Pa－1 and practical sensitivity is 1.5 rad·Pa－1.The minimum sound signal is 6.7 μPa(9.5 dB re 20 μPa) with Phase-generated Carrier (PGC) Method.The frequency response is flat from 20 Hz to 300 Hz.The experiment of the FOSS is feasible according to the sound propagation principle. |
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| Keywords: | Fiber-optic sensor Fiber-optic sound senor Michelson interferometer Flexural disk |
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